Yea I dont know exactly what it involves in doing it, I thought of something like that but am too lazy to do the effort. Id get a spare head light from the junkyard if your going to attempt just in case...
I still think my cai is more effective due to placing it out of the engine bay. All I used was this



and then cut out this



which put the filter here



Sorry about the size...
And one more thing, i paint the pvc pipe black so it doesnt look that bad actually...